Merge pull request #1 from akkie/master

Merge changes with main repository
Merge pull request #2 from akkie/master

Build with travis-ci
Merge pull request #3 from akkie/master

Add installation notes
Merge pull request #4 from akkie/master

Small typo changes
Merge pull request #5 from akkie/master

Update status image
Upgrade to Play Framework 2.2.1
Merge pull request #6 from fernandoacorreia/upgrade-play-2.2.1

Upgrade to Play Framework 2.2.1
Filter doesn't need an extractor anymore because it uses always SimpleResult
Add a note for Play Framework 2.1